1912] North American Scoliine 321 
which clothe those segments from the second back are rufous. The 
venter of the second abdominal segment is usually rufous except in the 
darker specimens. 
The length of the female ranges between 15 and 22 mm. and 
the males between 10 and 18 mm. 
This species is fully accounted for under the variations in 
the description of Scolia dubia dubia, which see for further 
information on the subject. 
The specimens I have seen were taken in Mexico, Texas, 
California, and Arizona. 
Scolia flavocostalis Cresson. 
? Scolia tricincta SAY West. Quart. Reporter, II, 1823, p. 74. 
Scolia flavocostalis. Cress., Trans. Amer. Ent. Soc., I, 1868, p. 377, no. 6, & 
The type is in the collection of the American Entomological 
Society at Philadelphia. 
Cresson describes the species as follows: 
“ Scolia (Discolia) flavocostalis, n. sp. 
‘““Male.—Black, deeply and rather closely punctured, clothed with 
long, golden pubescence; a spot on the anterior orbits, below the emar- 
gination of the eyes, and a narrow line on lower half of posterior orbits, 
yellow; mandibles bright fulvous, black at tips; antennz entirely 
black, robust; a spot on each side of prothorax anteriorly and another 
on postscutellum, yellow; scutellum with large, scattered punctures; 
tegulee fulvous; wings hyaline, with an opaline reflection, costa broadly 
yellow to the tip of marginal cell, beyond which it is violaceous-black; 
anterior wing with two submarginal cells, the second receiving one 
recurrent nervure; legs rufo-ferruginous, clothed with yellowish hair, 
most of coxe black; abdomen black, clothed with yellowish hair, 
especially dense on the apical margins of the segments, apex of the 
three basal segments more or less ferruginous; on each side of second 
and third segments above a yellow ovate spot, large and transverse on 
the third segment; fourth segment with a narrow, apical, yellow band, 
interrupted in the middle, and dilated laterally; apex with three short 
spines; venter blackish, most of the second segment ferruginous. Length 
4¥% lines. 
‘““One male specimen. This may be the male of S. Lewisii. It is, 
however, much smaller.” 
Besides the type in the American Entomological Society’s collection 
at Philadelphia, the writer has studied several specimens and has several 
before him, three of which closely agree with the description except that 
one has two large ferruginous spots on the dorsum of the first abdominal 
segment, one has a broad ferruginous band on the posterior part of the 
above segment and the fifth and sixth segments have an apical band of 
yellow, and the third has a narrow interrupted band of yellow on the 
fifth abdominal segment. The other specimens that have been studied 
